It has nothing to do with nationalism mate. I'm a communist for fecks sake, I believe that the working class has nothing to lose except their chains
. But let's not re-write history here.
Alexander the Great (unfortunately) was Greek. This is common ground for all the historians around the world except maybe some Turks and obviously some "Northern Macedonians". It is common belief and there are thousands of ancient writings about Alexander's origin. That being said, I coudn't care less about what he did. My personal view is that he was an imperialistic pig, but that's another topic.
The name "Northern Macedonia" was given after many verbal conflicts and finally compromise (from our part, thanks to our "beloved" goverment) between us(Greece) and mostly Turkey (cause let's not kid ourselves, they have under their influence all the muslim countries that surround Greece like Albania, Bosnia and FYROM). All the graves of former kings of Macedonia were discovered in Greece, all the ancient historians like Herodotus were writing about the greatest king of the Greeks(aka Alexander) and all our internal conflicts between Athens, Sparta, Macedonia and more were about who would be the king of Greece, also the sun of Vergina that "inspired" their flag was also found in Greece. And last but not least all that people from FYROM originate from Slavic tribes. Do you think that Greek and Slavic language are the same?
Anyway I have nothing personal with you or the OP. I wish him luck for his national team